1250 Unhappiness 2020 edition

[rejeanprimeau]

Usually when they use circlip, it's because of rotation. If you bolt, make sure the nut is positively locked.

[xLoneRiderx]

Originally Posted by Hippysmack

I like the idea of threading a nut on the end. I wish it was where you could get a bigger nut on it though with a thin stainless washer.
The only rub is it's irreversible to add the nut for most folks without shop tools.
I'm still wondering about the detent plate side load though, why I wish the threads could be cut bigger.

With the 7/32-28G thread, that is a fine thread UNF, you can use a thinner than standard nut without an issue. That's what UNF was born for, its fine thread pitch makes it much more difficult to be loosen by vibrations.

Regarding the detent plate side force, the mechanical solution the MoCo used for fixing the pins on the drum's head was 3 small bulges of metal protruding at the end of 3 small grooves in the middle of each pin. Well, this small bulges are not enough for stopping the pins in place but are enough to keep them midway in their holes creating that side force on the detent plate. Should you simply sand those bulges out then that side forces will be removed. Once the pins can move freely in and out the hole, there is nothing pushing them out against the plate (the pawl strain on the pins is perpendicular so it almost counts). That's what I will do on my tranny for the next time it fails (finger crossed!) sanding the pins and installing a new stock clip to support the detent plate.

Originally Posted by rejeanprimeau

Usually when they use circlip, it's because of rotation. If you bolt, make sure the nut is positively locked.

For your peace of mind, I can say the drum assemble is practically static, it only rotates some degrees whenever you change a gear. On the other hand, the stock (hated) clip does support an axle rotation up to 22,000 rpm.